regular usual routine区别题：cleaning the office is his routine dutyroutine可以换成regular\usual中的哪个答案是usual可是regular为啥不行?

regular usual routine区别题：cleaning the office is his routine dutyroutine可以换成regular\usual中的哪个答案是usual可是regular为啥不行?
regular usual routine区别
题：
cleaning the office is his routine duty
routine可以换成regular\usual中的哪个
答案是usual
可是regular为啥不行?

regular usual routine区别题：cleaning the office is his routine dutyroutine可以换成regular\usual中的哪个答案是usual可是regular为啥不行?
regular
adj.
1.规则的,有规律的;固定的;正常的
He's got no regular job.
他没有固定的工作.
2.定期的,定时的
He made a regular visit to his parents.
他定期看望父母亲.
3.经常的,习惯性的
Laura was one of his regular customers.
劳拉是他的老顾客之一.
4.普通的,一般的,标准的
Do you want regular or king size?
你要一般尺寸的还是特大尺寸的?
5.正规的;正式的,合乎礼仪的;合格的[B]
6.匀称的;端正的;整齐的
He is a handsome young man with regular features.
他是个五官端正的英俊青年.
usual
adj.
通常的,平常的;惯常的
He came home later than usual.
他回家比平时迟.
Shall we meet at the usual time and place?
我们在老地方老时间见面好吗?
这道题里主要是强调routine“惯例的,例行公事的”之意.
相比之下,usual可译为“惯常的”,而regular则没有这层意思,强调更多的是其规律性.